Sodium bisulphate also known as dry acid occurs as an odourless, hygroscopic white powder that is soluble in water. Its solutions are strongly acidic and corrosive. It is manufactured by reacting sodium hydroxide with sulphuric acid. Sodium bisulphate acts as a technological additive, a preservative, a disinfectant, an acidity regulator, and a cleaner. It is used in agriculture, metal, oil, cleaning and textile industries. Sodium Bisulphate is frequently used as a replacement for sulphuric Acid in many applications as sulphuric Acid is highly dangerous to transport.

Sodium Hydrogensulphate is a white, crystalline and spherical shaped (beads) substance with high hygroscopic properties.The single beads have an approximate diameter of 0,75 mm.It is an acid salt, a so called solid acid. Solutions of Sodium Hydrogensulphate are caustic and on metal they have a corrosive effect.

Application:

Cleaning industry: - cleaning agent in household (WC cleaning powder), cleaning agent for dairies and industry
Waste water/Water industry: - for the adjustment of the pH value (decreasing - also suitable for pool water)
Technical/Chem. industry: - for the dehydration of Castor oil (as solid acid)
Textile industry: - for bleaching and dyeing of wool as auxiliary agent / spinning of viscose (as an additive to spinning baths) / improvement of colour retention when using dicyandiamide
Optics: - for technical glass and polishing and grinding agent
Caoutchouc: - for the reprocessing of used caoutchouc
Leather industry: - for the bleaching and swelling of skins
Metal industry: - for the pickling of metals (as flux)
Mineral oil industry: - for extracting nitrogen compounds from hydrogencarbons
Treatment of litter/manure on poultry farms

Regulation, Health, and Safety

When a chemical is used in pharmaceutical preparations, personal care products, or as a food additive, it is monitored by the U.S. Food and Drug Administration (FDA). When it is used for cleaning and industrial uses, it is monitored by the Environmental Protection Agency (EPA).

Sodium bisulfate is very irritating to the skin and can cause severe eye damage if contact occurs. Also, swallowing the chemical can cause symptoms, such as diarrhea, vomiting, and low blood pressure. Also, it is considered acutely toxic according to the U.S. Environmental Protection Agency as noted in the Pesticide Action Network of North America database.

First-aid measures include seeking immediate medical attention and not inducing vomiting if the chemical is swallowed. Also, MedLine Plus notes to immediately drink water or milk unless otherwise instructed by medical personnel or if the person is unable to swallow due to convulsions or vomiting, for example. If the chemical gets on the skin, wash with water for at least 15 minutes. If the chemical is inhaled, move to an area with fresh air.